Pre-heat the oven to 180c or 375f.
Mix the flour, sugar and oats in a large bowl.
Cut the butter in until the mix resembles bread crumbs.
Make a well in the centre and add the vanilla paste, yogurt and buttermilk.
Gently mix the dough with a spatula or spoon, until the mixture just about comes together.
Add the blueberries and mix until just combined.
Tip the dough onto a floured surface and bring the dough together into a round disk.
Cut into eight scones.
Bake on a piece of non stick paper on a baking tray in the oven.
Bake for about 25-30 minutes.
Leave to cool on a wire rack then glaze if desired.